I just recently swapped to Autometer gauges in the center pods. I couldn't find any guage kits, so after experimenting with various glues we found one that worked. I can't remember what we used unfortunately.
After wiring them in, I had one person help me hold them in place while I'll positioned them. After sitting overnight they've held great. I drive the car alot and it's been over 4 months since doing this. Looks pretty good.